Installation problem

Hi I'm trying to install a new zimbra server over a fresh installed ubuntu 10.04 lts server.
I set static ip, than I create a record in my domain dns server. I also create a mx record, matching with the a record.
When I start installation procedure everything seems to go welll.
But as the script is trying to start the server nothing happens. Looking in log file the last line is "starting mta".
The average load is around 28. For hours.... Where is the problem? What I'm doing wrong?
Tnx
Alberto

I left instal.sh running yrsterday night when i left my office. Now I find some progress buta lot of errors. In main terminal i find this:
Starting servers...sh: line 1: 22604 Killed /opt/zimbra/bin/zmprov -l gs zimbra.emergency.emergency.it 2> /dev/null
Unable to determine enabled services from ldap.